Importing Last Name and FN, Different last names

1) I mapped FIRST NAME and LN from csv into same in Act, but doesn't seem to do anything. I expected that when I looked at the Contact's FN/LN pop-up box, that it would be filled in correctly. But it seems that the Contact data take precedence.

For example, when CONTACT = Dave L. & Kathy Smith, FN = Dave & Kathy in csv, the result is FIRST NAME = Dave L. in Act.. WHY? It seems like importing FN and LN into Act doesn't do anything if you also import a CONTACT. True?

2) Am I missing a strategy to better handle contacts with different last names?

For example, CONTACT = Frank Wright & Amelia Earhart. I want the Saluation to read Frank and Amelia, but that isn't even one of the drop down choices. So, I have to manually type it. So, the FN and LN fields will never be right for reports.